Well, no one of them is any more official than any other. It is up to you to read through them and decide which you think most accurately represents what a halfling warband would be and which is most balanced for play. Or, possibly, which one your friends will let you play (if any).

I have little experience with the furry foots but the Flame On group have featured halflings in many of their Sartosa and Vercuso campaigns. Give a shout (PM) to Warboss Kurgan or Blessed Knight and they can give better feedback.